Week 3 Flashcards
What register gives the greatest freedom to act?
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When is the freedom to act? What is the freedom to act?
B/t quiet tidal and respiration for speech or where passive forces are balanced
when the body can “spring” into action without strain or stiffness
What are the muscles of inhalation and their innervations?
External Spinal intercostal muscles (T1-T12)
Posterior neck muscles (C2-3, C5-8 and Cranial nerve 11)
Diaphragm - (Phrenic nerve (C3-5))
What are the muscles of forced exhalation and the innervations?
Internal spinal intercostal muscles (T 1-12)
What is total lung capacity?
Total air in lungs
~ 6,000 mL for males
~ 5,200 mL for females
What is vital capacity?
air that can be expired
~4,000 mL
What is quiet tidal volume?
midrange of VC
~38-58 %VC
~500 mL
What is IRV?
Air that can be forcibly inhaled after quiet inspiration
55-100% VC
~2,500 mL
What is ERV?
Air that can be forcibly expired after quiet expiration
0-38% VC
900 mL+
What is residual volume?
Air that stays in lungs
~1,200 mL
What percentage of VC is resting lung volume?
~ 38%
Does inspiration or expiration take up more of the cycle for breathing for speech
Expiration
Inspiration ~10%
Expiration ~90%
What is the difference between passive and active forces of respiration?
Active - muscular forces
Passive - non-muscular
What is checking action?
Maintenance of constant subglottal pressure
Control speed of chest wall collapse
loudness control
What are the passive forces of respiration?
Gravity
Pleural linkage
Elasticity of bone, cartilage, lungs, and connective tissue
